/*
 * Copyright 2019 The Kubernetes Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { Arguments, Registrar, KResponse } from '@kui-shell/core'

import flags from './flags'
import { exec } from './exec'
import { KubeOptions } from './options'
import { isUsage, doHelp } from '../../lib/util/help'
import { doGetAsTable } from './get'

const verb = 'top'

/**
 * This is the main handler for `kubectl top`.
 *
 */
const doTop = (command: string) =>
  async function _doTop(args: Arguments<KubeOptions>): Promise<KResponse> {
    if (isUsage(args)) {
      return doHelp(command, args)
    } else {
      // first, we do the raw exec of the given command
      const response = await exec(args)

      return doGetAsTable(command, args, response, verb)
    }
  }

export default (commandTree: Registrar) => {
  commandTree.listen(`/kubectl/${verb}/node`, doTop('kubectl'), flags)
  commandTree.listen(`/k/${verb}/node`, doTop('k'), flags)
  commandTree.listen(`/kubectl/${verb}/pod`, doTop('kubectl'), flags)
  commandTree.listen(`/k/${verb}/pod`, doTop('k'), flags)
}
